Apologies if this sounds harsh, but it is your responsibility, and yours alone, to understand how Joomla! (and it's templating system) works. I would suggest you do not join a template club and then expect people on the board to instruct you on some of the core technologies of Joomla!
Simon
No, it doesnt sound harsh .. it sounds stupid. Apologies if that sounds harsh. Basic business ... there should be language saying to get the template to look like the demo requires some "assembly." There is no such language. They are selling templates .. "join" and "buy" ... NOT "go over to Joomla.org, spend hours learning it, use their two basic templates first, then come back here if you're ready and buy our templates, because they don't look like the demos out of the box."
Im not here to argue with you or anyone, just making observations and asking for help. So get off the high horse. Im here because I love the template demos and I want to use them. RT does great work.
Please refer to the official Joomla! forums at forum.joomla.org for help on using or customizing templates and administration, and search this site in our Tips and Tricks section.